Malicious PDF — malware analysis report

Static analysis result for SHA-256 c365afec37c14507…

MALICIOUS

PDF

78.5 KB Created: 2021-02-07 03:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1a86b5457ebc54549883963afaafe02d SHA-1: 537d3d81443e032b1e4c5e3239993bc1318decdc SHA-256: c365afec37c14507ea3f5bacd80150c2431d4d26dbc224fc35b6de86e4f32839
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/aws?utm_term=australian+visa+application+form+png+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5fd846c2cca0f.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/janujuz.pdfIn PDF document text
    • https://rasazumeg.weebly.com/uploads/1/3/1/4/131454762/8809004.pdfIn PDF document text
    • https://dosodufixelo.weebly.com/uploads/1/3/2/6/132682620/8787480.pdfIn PDF document text
    • http://heleogose.online/bewemabokeduzijilitobozam3wrbj.pdfIn PDF document text
    • http://vandify.com/bintang_kehidupan_setia_bandk04ed.pdfIn PDF document text
    • https://buvonidodiwa.weebly.com/uploads/1/3/4/3/134332647/068dd205f5b8aaa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/pofikepoda.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/calendar_apps_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/42723419370.pdfIn PDF document text
    • http://lunurubu.rf.gd/orion_starshoot_autoguider_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/lol_akali_top_guide.pdfIn PDF document text
    • http://larisakexifa.epizy.com/grade_6_math_worksheets_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/angular_reactive_forms_set_value_null.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/komufejimezivanusomux.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DA 5524 bytes
SHA-256: c02b620717a619ce60719bbb3d698919a8e95eea9eada565cbfeddc1bb82b3fd
font_01_sfnt_off00010597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10597 11140 bytes
SHA-256: 3573672d7a43ed96cbb839fdc56fd7a6646595919e34a030fa2b3d171bd828c5